CN111926277A - Device and method for inhibiting vibration of hot-dip galvanized strip steel after being discharged from zinc pot - Google Patents
Device and method for inhibiting vibration of hot-dip galvanized strip steel after being discharged from zinc pot Download PDFInfo
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- CN111926277A CN111926277A CN202010926239.7A CN202010926239A CN111926277A CN 111926277 A CN111926277 A CN 111926277A CN 202010926239 A CN202010926239 A CN 202010926239A CN 111926277 A CN111926277 A CN 111926277A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- Coating With Molten Metal (AREA)
Abstract
The invention discloses a vibration suppression device and a suppression method for hot-dip galvanized strip steel after being discharged from a zinc pot. The device comprises an upper vibration suppression roller and an upper transverse moving mechanism, a lower vibration suppression roller and a lower transverse moving mechanism, an upper laser range finder, a lower laser range finder, an encoder and a PLC (programmable logic controller) control system, wherein the laser range finder feeds back the surface position of the strip steel in real time; the invention obviously reduces the vibration amplitude of the strip steel, ensures the uniformity of the thickness of the zinc coating of the strip steel, avoids the surface scratch of the strip steel and meets the production requirement of high-quality zinc-coated strip steel.
Description
Technical Field
The invention relates to the technical field of strip steel production, in particular to a device and a method for inhibiting vibration of hot-dip galvanized strip steel after the hot-dip galvanized strip steel is discharged from a zinc pot.
Background
The height between the galvanized strip steel of the hot galvanizing production line and a top roller of a cooling tower after the galvanized strip steel is discharged from a zinc pot is about 30 to 50 meters, no support is arranged in the middle, and the strip steel is easy to vibrate in the ascending process. The vibration peak value of the strip steel in the middle of the suspension can reach 50mm, the thickness and uniformity of a zinc coating are directly influenced by the vibration of the strip steel after the strip steel is discharged from a zinc pot, and the strip steel is easy to scrape the surface of the strip steel by an air knife in the vibration process, so that the strip steel has great influence on the production of high-quality plates.
In order to inhibit the vibration of the strip steel, a strip steel vibration electromagnetic damping device is installed on part of the hot galvanizing production line, and the amplitude of the strip steel vibration is inhibited by utilizing electromagnetic induction devices installed near the upper surface and the lower surface of the strip steel. The electromagnetic damping device has a complex structure and large investment. The distance between the strip steel and the electromagnetic induction device is relatively far, so that the magnetic leakage phenomenon is obvious, and the magnetic leakage phenomenon is serious especially for thin galvanized strip steel. The electromagnetic damping device has poor vibration suppression effect on thick-specification strip steel, and is difficult to meet production requirements. Therefore, the design of a vibration suppression device and a suppression method after the hot-dip galvanized steel strip is discharged from a zinc pot is urgently needed to solve the problems of uneven thickness of a zinc coating caused by the vibration of the hot-dip galvanized steel strip discharged from the zinc pot, high manufacturing cost of the existing equipment and operation defects.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a device and a method for inhibiting vibration of hot-dip galvanized steel strip after the hot-dip galvanized steel strip is discharged from a zinc pot.
The technical scheme adopted by the invention for solving the technical problems is as follows: a vibration suppression device after a hot-dip galvanized steel strip is discharged from a zinc pot is characterized by comprising a zinc pot, an upper vibration suppression roller, an upper transverse moving mechanism, a lower vibration suppression roller, a lower transverse moving mechanism, an upper laser range finder, a lower laser range finder, an encoder and a PLC (programmable logic controller) control system, wherein a sinking roller is arranged in the zinc pot and used for changing the conveying direction of the hot-dip galvanized steel strip;
the device comprises a zinc pot, a steel strip, a lower laser range finder, a lower transverse moving mechanism, a lower vibration suppression roller, an upper transverse moving mechanism, an upper vibration suppression roller and an upper transverse moving mechanism, wherein the lower laser range finder is arranged above the zinc pot and on one side of the steel strip, the lower transverse moving mechanism is arranged above the lower laser range finder, the lower transverse moving mechanism is arranged close to the end part of one side of the steel strip and drives the lower vibration suppression roller to transversely move, the upper transverse moving mechanism is arranged above the lower transverse moving mechanism and drives the upper vibration suppression roller to transversely move.
Specifically, the lower vibration suppression roller and the upper vibration suppression roller are respectively provided with a driving device for driving the lower vibration suppression roller and the upper vibration suppression roller to rotate, and the driving devices are connected with the PLC control system and used for controlling the linear speed of the lower vibration suppression roller and the upper vibration suppression roller to be consistent with the running speed of the strip steel when the lower vibration suppression roller and the upper vibration suppression roller rotate.
Specifically, the lower laser range finders and the upper laser range finders are distributed on two sides of the strip steel in a staggered mode and are used for measuring the surface position of the strip steel in real time in the vertical direction of the strip steel, the lower laser range finders and the upper laser range finders are connected with the PLC control system and transmit the surface position of the strip steel measured in real time to the PLC control system, and the surface position of the strip steel measured in real time is subjected to difference calculation with the balance point position of the strip steel preset in the PLC control system to obtain the vibration amplitude of the strip steel.
Specifically, the vibration amplitude of the strip steel detected by the lower laser range finder is L, and the vibration amplitude threshold value preset in the PLC control system is L0The vibration amplitude of the strip steel detected by the upper laser range finder is X, and the preset vibration amplitude threshold value at the position in the PLC control system is X0。
Specifically, the roll diameters of the lower vibration suppression roll and the upper vibration suppression roll are D.
A method for inhibiting a vibration inhibiting device of hot-dip galvanized strip steel after the hot-dip galvanized strip steel is discharged from a zinc pot comprises the following steps:
1) the lower laser range finder measures the surface position of the strip steel in real time, and the PLC control system calculates the difference value according to the position of a preset strip steel balance point to obtain the vibration amplitude L of the lower part of the strip steel;
2) measuring the surface position of the strip steel in real time by an upper laser range finder, and calculating a difference value by a PLC control system according to the position of a preset strip steel balance point to obtain a vibration amplitude X at the upper part of the strip steel;
3) when the vibration amplitude L is less than or equal to the vibration amplitude threshold value L0And the vibration amplitude X is less than or equal to the vibration amplitude threshold value X0When the vibration damping device is used, the upper vibration damping roller and the lower vibration damping roller do not rotate, and the upper transverse moving mechanism and the lower transverse moving mechanism do not act;
4) when the vibration amplitude L is larger than the vibration amplitude threshold value L0When, or the upper vibration amplitude X is larger than the vibration amplitude threshold value X0When the strip steel is processed, the PLC control system drives the upper vibration suppression roller or the lower vibration suppression roller to rotate according to the real-time running speed of the strip steel measured by the encoder, and the linear speed of the upper vibration suppression roller or the lower vibration suppression roller is kept the same as that of the strip steel;
5) the upper transverse moving mechanism and the lower transverse moving mechanism respectively drive the upper vibration suppression roller and the lower vibration suppression roller to move towards the direction close to the surface of the strip steel, the moving distance is delta X-X0, and after the transverse moving mechanism completes the stroke, if the vibration amplitude L is less than or equal to L0The upper vibration suppression roller and the lower vibration suppression roller keep rotating, and the upper transverse moving mechanism and the lower transverse moving mechanism do not act;
6) if the vibration amplitude L is larger than L0The PLC control system controls the gradual reduction of the running speed of the strip steel, simultaneously controls the linear speed of the roll surface of the upper vibration suppression roll and the lower vibration suppression roll to be kept synchronous with the running speed of the strip steel, the upper transverse moving mechanism and the lower transverse moving mechanism continue to move, the central lines of the upper vibration suppression roll and the lower vibration suppression roll respectively cross the central line of the balance position of the strip steel, the moving distance delta X is less than or equal to 0.1D until L is less than or equal to L0When the upper and lower traverse mechanisms stop operating, the upper and lower traverse mechanisms stop operating.
Specifically, in the transverse moving process of the upper vibration suppression roller and the lower vibration suppression roller in the step 6, the center of the upper vibration suppression roller and the center of the lower vibration suppression roller cross the balance center line of the strip steel by no more than 0.1D.
The invention has the following beneficial effects:
according to the device and the method for inhibiting the vibration of the hot-dip galvanized steel strip after the hot-dip galvanized steel strip is discharged from the zinc pot, the surface position of the steel strip is fed back in real time through the upper laser range finder and the lower laser range finder, the PLC control system performs difference operation on the measured distance and the set distance of the laser range finder to determine the actual vibration amplitude of the steel strip, when the vibration amplitude of the steel strip exceeds the set threshold value, the transverse moving mechanism drives the vibration inhibiting roller to approach the surface of the steel strip, the vibration amplitude of the steel strip is inhibited, and the vibration amplitude is limited; the encoder feeds back the running linear speed of the strip steel in real time, controls the rotating speed of the vibration suppression roller, ensures that the linear speed of the roller surface of the vibration suppression roller is consistent with the running speed of the strip steel, and avoids scratching the surface of the strip steel; the invention has simple structure and reliable control, obviously reduces the vibration amplitude of the strip steel, ensures the uniformity of the thickness of the zinc coating of the strip steel, avoids the surface scratch of the strip steel and improves the zinc coating quality.
Drawings
FIG. 1 is a schematic structural diagram of a vibration suppression device after hot-dip galvanized steel strip is discharged from a zinc pot.
FIG. 2 is a flow chart of a method for suppressing vibration after hot-dip galvanized steel strip is taken out of a zinc pot.
In the figure: 1-a zinc pot; 2-sink roll; 3-an air knife; 4-lower laser rangefinder; 5-a lower traversing mechanism; 6-lower vibration suppression roller; 7-an encoder; 8-overhead cooling rolls; 9-mounting a vibration suppression roller; 10-an upper traversing mechanism; 11-upper laser rangefinder; 12-strip steel.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely further explained in detail in the following with the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, the device for inhibiting the vibration of hot-dip galvanized steel strip after being discharged from a zinc pot comprises an upper vibration inhibiting roller 9, an upper transverse moving mechanism 10, a lower vibration inhibiting roller 6, a lower transverse moving mechanism 5, an upper laser range finder 11, a lower laser range finder 4, an encoder 7, a PLC control system and the like. The hot galvanizing zinc-plating device comprises a zinc pot 1 and a hot galvanizing strip steel 12 extending into the zinc pot 1, wherein a sink roller 2 is arranged in the zinc pot 1 and used for hot galvanizing of the strip steel 12, air knives 3 are arranged above the zinc pot 1 and on two sides of the strip steel 12, a tower top cooling roller 8 is connected to the upper portion of the strip steel 12 and used for driving the strip steel 12 to go out of the zinc pot, and an encoder 7 is arranged on the tower top cooling roller 8 and used for acquiring the running speed of the strip steel 12 in real time and transmitting the running speed to a PLC.
The zinc pot is characterized in that a lower laser range finder 4 is arranged above the zinc pot 1 and on one side of a steel strip 12, a lower transverse moving mechanism 5 is arranged above the lower laser range finder 4, the lower transverse moving mechanism 5 is close to the end part of one side of the steel strip 12 and is provided with a lower vibration suppression roller 6, the lower transverse moving mechanism 5 is used for driving the lower vibration suppression roller 6 to transversely move, the upper transverse moving mechanism 5 is arranged above the lower transverse moving mechanism 5 and is provided with an upper laser range finder 11 on the other side of the steel strip 12, an upper transverse moving mechanism 10 is arranged above the upper laser range finder 11, the upper vibration suppression roller 9 is arranged on the upper transverse moving mechanism 10 and is close to the end part of one side of.
The lower laser range finders 4 and the upper laser range finders 11 are distributed on two sides of the strip steel 12 in a staggered mode and are used for measuring the surface position of the strip steel 12 in real time in the vertical direction of the strip steel 12, the lower laser range finders 4 and the upper laser range finders 11 are connected with the PLC control system and transmit the surface position of the strip steel measured in real time to the PLC control system, and the surface position of the strip steel is differenced with the balance point position of the strip steel 12 preset in the PLC control system to obtain the vibration amplitude of the strip steel 12. The vibration amplitude of the strip steel detected by the lower laser range finder 4 is L, and the preset vibration amplitude allowable value at the position in the PLC control system is L0The vibration amplitude of the strip steel detected by the upper laser range finder 11 is X, and the preset vibration amplitude allowable value in the PLC control system is X0。
The lower vibration suppression roller 6 and the upper vibration suppression roller 9 are both provided with a driving device for driving the lower vibration suppression roller 6 and the upper vibration suppression roller 9 to rotate, and the driving device is connected with a PLC control system for controlling the rotating speed of the lower vibration suppression roller 6 and the upper vibration suppression roller 9. The roll diameters of the lower vibration suppression roll 6 and the upper vibration suppression roll 9 are D. When the vibration amplitude of the strip steel exceeds a set threshold value, the upper transverse mechanism 10 and the lower transverse mechanism 5 respectively drive the upper vibration suppression roller 9 and the lower vibration suppression roller 6 to approach the surface of the strip steel, so that the vibration amplitude of the strip steel is suppressed, and the vibration amplitude is limited within the set threshold value. The encoder 7 feeds the running linear speed of the strip steel back to the PLC control system in real time, controls the rotating speeds of the upper vibration suppression roller 9 and the lower vibration suppression roller 6, ensures that the linear speed of the roller surface of the vibration suppression roller is consistent with the linear speed of the strip steel, and avoids the surface of the strip steel from being scratched.
As shown in fig. 2, a method for suppressing vibration of a hot-dip galvanized steel strip after being discharged from a zinc pot comprises the following steps:
a. the lower laser range finder 4 measures the surface position of the strip steel in real time, and the PLC control system calculates the difference value according to the position of a preset strip steel balance point to obtain the vibration amplitude L of the lower part of the strip steel;
b. the upper laser range finder 11 measures the surface position of the strip steel in real time, and the PLC control system calculates the difference value according to the position of a preset strip steel balance point to obtain the vibration amplitude X of the upper part of the strip steel;
c. when the laser range finder 4 detects that the vibration amplitude L of the strip steel is less than or equal to the allowable vibration amplitude value L0And the vibration amplitude X of the strip steel detected by the upper laser range finder 11 is less than or equal to the allowable vibration amplitude value X at the position0In the process, the upper vibration suppression roller 9 and the lower vibration suppression roller 6 do not rotate, and the upper transverse moving mechanism 10 and the lower transverse moving mechanism 5 do not act;
d. when the laser range finder 4 detects that the vibration amplitude L of the strip steel is larger than the allowable vibration amplitude value L of the strip steel0When the vibration amplitude X of the strip steel detected by the upper laser range finder 11 is larger than the allowable value X of the vibration amplitude at the position0When the strip steel vibration suppression device is used, the PLC control system drives the upper vibration suppression roller 9 or the lower vibration suppression roller 6 to rotate according to the real-time running speed of the strip steel measured by the encoder 7, and the roller surface and the strip steel keep the same linear speed;
e. the upper transverse mechanism 10 and the lower transverse mechanism 5 respectively drive the upper vibration suppression roller 9 and the lower vibration suppression roller 6 to move towards the direction close to the surface of the strip steel, the moving distance is delta X-X0 (namely the absolute value of X-X0), after the upper transverse mechanism 10 and the lower transverse mechanism 5 complete the stroke, the lower laser range finder 4 feeds back the vibration amplitude of the strip steel, and if L is less than or equal to L0The upper vibration suppression roller 9 and the lower vibration suppression roller 6 keep rotating, and the upper transverse moving mechanism 10 and the lower transverse moving mechanism 5 do not act;
f. if still vibrating the amplitudeThe value L > L0Gradually reducing the speed according to the current running speed of the strip steel 12 acquired by the encoder 7; simultaneously controlling the linear speed of the roll surface of the upper vibration suppression roll 9 and the lower vibration suppression roll 6 to keep synchronous with the running speed of the strip steel, continuously moving the upper transverse mechanism 10 and the lower transverse mechanism 5, respectively crossing the central line of the balance position of the strip steel 12 by the central lines of the upper vibration suppression roll 9 and the lower vibration suppression roll 6, and moving the distance delta X to be less than or equal to 0.1D until L is less than or equal to L0At this time, the upper traverse mechanism 10 and the lower traverse mechanism 5 stop operating. In the process that the upper vibration suppression roller 9 and the lower vibration suppression roller 6 transversely move, the center of the upper vibration suppression roller 9 and the center of the lower vibration suppression roller 6 cross the balance center line of the strip steel 12 and do not exceed 0.1D.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (7)
1. A vibration suppression device after a hot-dip galvanized steel strip is discharged from a zinc pot is characterized by comprising a zinc pot, an upper vibration suppression roller, an upper transverse moving mechanism, a lower vibration suppression roller, a lower transverse moving mechanism, an upper laser range finder, a lower laser range finder, an encoder and a PLC (programmable logic controller) control system, wherein a sinking roller is arranged in the zinc pot and used for changing the conveying direction of the hot-dip galvanized steel strip;
the device comprises a zinc pot, a steel strip, a lower laser range finder, a lower transverse moving mechanism, a lower vibration suppression roller, an upper transverse moving mechanism, an upper vibration suppression roller and an upper transverse moving mechanism, wherein the lower laser range finder is arranged above the zinc pot and on one side of the steel strip, the lower transverse moving mechanism is arranged above the lower laser range finder, the lower transverse moving mechanism is arranged close to the end part of one side of the steel strip and drives the lower vibration suppression roller to transversely move, the upper transverse moving mechanism is arranged above the lower transverse moving mechanism and drives the upper vibration suppression roller to transversely move.
2. The device for suppressing vibration of hot-dip galvanized steel strip after being discharged from a zinc pot according to claim 1, wherein the lower vibration suppression roller and the upper vibration suppression roller are respectively provided with a driving device for driving the lower vibration suppression roller and the upper vibration suppression roller to rotate, and the driving devices are connected with a PLC control system for controlling the linear speed of the lower vibration suppression roller and the upper vibration suppression roller to be consistent with the running speed of the steel strip during rotation.
3. The device for suppressing vibration of hot-dip galvanized steel strip after being discharged from a zinc pot according to claim 1, wherein the lower laser distance meters and the upper laser distance meters are distributed on two sides of the steel strip in a staggered manner and are used for measuring the surface position of the steel strip in real time in the vertical direction of the steel strip, the lower laser distance meters and the upper laser distance meters are both connected with a PLC control system and transmit the surface position of the steel strip measured in real time to the PLC control system, and the vibration amplitude of the steel strip is calculated by taking the difference between the surface position of the steel strip measured in real time and the balance point position of the steel strip preset in the PLC control.
4. The device for suppressing vibration after discharging of hot-dip galvanized steel strip from a zinc pot according to claim 1, wherein the vibration amplitude of the steel strip detected by the lower laser range finder is L, and the vibration amplitude threshold value preset in a PLC control system is L0The vibration amplitude of the strip steel detected by the upper laser range finder is X, and the preset vibration amplitude threshold value at the position in the PLC control system is X0。
5. The device for suppressing vibration after discharging a hot-dip galvanized steel strip from a zinc pot according to claim 1, wherein the roll diameters of the lower vibration suppression roll and the upper vibration suppression roll are both D.
6. The method for suppressing the vibration of the hot-dip galvanized steel strip after being discharged from the zinc pot according to any one of claims 1 to 5, comprising the steps of:
1) the lower laser range finder measures the surface position of the strip steel in real time, and the PLC control system calculates the difference value according to the position of a preset strip steel balance point to obtain the vibration amplitude L of the lower part of the strip steel;
2) measuring the surface position of the strip steel in real time by an upper laser range finder, and calculating a difference value by a PLC control system according to the position of a preset strip steel balance point to obtain a vibration amplitude X at the upper part of the strip steel;
3) when the vibration amplitude L is less than or equal to the vibration amplitude threshold value L0And the vibration amplitude X is less than or equal to the vibration amplitude threshold value X0When the vibration damping device is used, the upper vibration damping roller and the lower vibration damping roller do not rotate, and the upper transverse moving mechanism and the lower transverse moving mechanism do not act;
4) when the vibration amplitude L is larger than the vibration amplitude threshold value L0When, or the upper vibration amplitude X is larger than the vibration amplitude threshold value X0When the strip steel is processed, the PLC control system drives the upper vibration suppression roller or the lower vibration suppression roller to rotate according to the real-time running speed of the strip steel measured by the encoder, and the linear speed of the upper vibration suppression roller or the lower vibration suppression roller is kept the same as that of the strip steel;
5) the upper transverse moving mechanism and the lower transverse moving mechanism respectively drive the upper vibration suppression roller and the lower vibration suppression roller to move towards the direction close to the surface of the strip steel, the moving distance is delta X-X0, and after the transverse moving mechanism completes the stroke, if the vibration amplitude L is less than or equal to L0The upper vibration suppression roller and the lower vibration suppression roller keep rotating, and the upper transverse moving mechanism and the lower transverse moving mechanism do not act;
6) if the vibration amplitude L is larger than L0The PLC control system controls the gradual reduction of the running speed of the strip steel, simultaneously controls the linear speed of the roll surface of the upper vibration suppression roll and the lower vibration suppression roll to be kept synchronous with the running speed of the strip steel, the upper transverse moving mechanism and the lower transverse moving mechanism continue to move, the central lines of the upper vibration suppression roll and the lower vibration suppression roll respectively cross the central line of the balance position of the strip steel, the moving distance delta X is less than or equal to 0.1D until L is less than or equal to L0When the upper and lower traverse mechanisms stop operating, the upper and lower traverse mechanisms stop operating.
7. The method for suppressing vibration after discharging the hot-dip galvanized steel strip from the zinc pot as set forth in claim 6, wherein the center of the upper vibration suppressing roller and the center of the lower vibration suppressing roller in the step 6 do not exceed 0.1D beyond the center line of balance of the steel strip during the traversing process.
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| CN202010926239.7A CN111926277B (en) | 2020-09-07 | 2020-09-07 | Device and method for inhibiting vibration of hot-dip galvanized strip steel after being discharged from zinc pot |
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| CN202010926239.7A CN111926277B (en) | 2020-09-07 | 2020-09-07 | Device and method for inhibiting vibration of hot-dip galvanized strip steel after being discharged from zinc pot |
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